Question: When did Charlemagne's child Charles the Younger was born and who was his mother?
Paraphrase: What is the date of the birth of Charlemagne's son, O Lovem, and who would his mother be?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q3044 p:P40 ?s . ?s ps:P40 wd:Q283107 . ?s pq:P569 ?value1 . ?s pq:P25 ?value2 }